光催化
量子产额
对苯二甲酸
光化学
水溶液
产量(工程)
化学
氧化磷酸化
碘化物
激进的
羟基自由基
荧光
无机化学
材料科学
催化作用
有机化学
物理
量子力学
聚酯纤维
冶金
生物化学
作者
Keiichiro Ishibashi,Akira Fujishima,Toshiya Watanabe,Kazuhito Hashimoto
标识
DOI:10.1016/s1010-6030(00)00264-1
摘要
The quantum yield of hydroxyl radical (⋅OH) production during TiO2 photocatalysis was estimated to be 7×10−5 in aqueous solution by means of a method using terephthalic acid as a fluorescence probe. This value is much lower than the quantum yield of ordinary photocatalytic reactions (∼10−2). Conversely, the quantum yield of hole generation estimated by iodide ion oxidation was equivalent (5.7×10−2) to that of ordinary photocatalytic reactions. This implies that oxidative reactions on TiO2 photocatalyst occur mainly via photogenerated holes, not via ⋅OH.
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